Forum Discussion
CirrusHow does Virtual Location monitor determine if pool member is local?
Hi there, doc says that the virtual location monitor determines whether a pool member is local (residing in the same data center as the BIG-IP system) or remote (residing in a different data center). How does it do this? Thanks!
johnbernardcheuThe closest I got to answering this question is that when using the Virtual Location monitor, the BIG-IP sets the Priority Group value of all local pool members to 2 (a higher priority). When a member of a load balancing pool migrates to a remote data center the Virtual Location monitor lowers the members Priority Group value to 1 (a lower priority).
Hi,
The Virtual Location monitor will determine if a pool member which has a virtual IP is currently a local pool member with its arp entry existing on a local VLAN, or, a remote pool member with its ARP entry existing on a tunnel VLAN.
If the pool member is local it will set the pool member's priority to 2. If the pool member is remote it will set the priority to 1 (a lower priority).
The Virtual Location will always return up as the availability for the pool member. It is necessary to use an additional monitor to check the availability status of the pool member.
https://clouddocs.f5.com/cli/tmsh-reference/latest/modules/ltm/ltm-monitor-virtual-location.html
